Pure polycrystalline phases and single crystals of four new quaternary alkali metal yttrium tellurites, NaYTe4O10, KY(TeO3)2, RbY(TeO3)2, and CsYTe3O8, have been prepared by solid-state and hydrothermal reactions using A2CO3 (A = Na, K, Rb, and Cs), Y(NO3)3·6H2O, Y2O3, and TeO2 as starting reagents. X-ray diffraction analyses suggest that NaYTe4O10 exhibits a highly symmetric three-dimensional (3D) framework consisting of YO8 square antiprisms and chains of TeO4 polyhedra. Within the framework, six- (6-) and eight-membered ring (8-MR) channels are observed. KY(TeO3)2 and RbY(TeO3)2 are isostructural to each other and reveal another 3D framework with structures containing YO6 octahedra and TeO3 trigonal pyramids with 4-MR and 12-MR channels. CsYTe3O8 shows a hexagonal tungsten bronze (HTB)-like topology composed of hexagonal tungsten oxide-like layers of TeO4 polyhedra and YO6 octahedral linkers with 3-MR and 6-MR channels. Thermal analyses, elemental analyses, and spectroscopic characterizations, such as UV-vis diffuse reflectance and infrared spectra, are presented, as are local dipole moment calculations for the constituent asymmetric polyhedra TeO3 and TeO4.

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Rich Structural Chemistry in New Alkali Metal Yttrium Tellurites: Three-Dimensional Frameworks of NaYTe 4O10, KY(TeO3)2, RbY(TeO3)2, and a Novel Variant of Hexagonal Tungsten Bronze, CsYTe 3O8. -The new compounds (IV), (VI), and (VIII) are characterized by powder and single crystal XRD, SEM, IR, and UV/VIS diffuse reflectance spectroscopy. (IV) crystallizes in the space group P42/nbc with Z = 4. It exhibits a three-dimensional framework consisting of YO8 square antiprisms and chains of TeO 4 polyhedra. The framework contains 6-and 8-membered ring channels. (VIa) and (VIb) crystallize isostructurally in the space group Pnma with Z = 4. Their three-dimensional frameworks contain YO6 octahedra and TeO3 trigonal pyramids with 4-and 12-membered ring channels. (VIII) crystallizes in the space group R3 with Z = 6. The compound shows a hexagonal tungsten bronze-like topology composed of hexagonal tungsten oxide-like layers of TeO 4 polyhedra and YO6 octahedral linkers with 3and 6-membered ring channels. -(KIM, Y.; LEE, D. W.; OK*, K. M.; Inorg. Chem. 54 (2015) 1, 389-395, http://dx.